Incandescent spotlight luminaire



5, 1954 B. A. WYMAN ET AL 2,665, 72

INCANDESCENT SPOTLIGHT LUMINAIRE Filed July 31, 1947 2 Sheets-Sheet lINVENTORS Burfon A. W man & Ffwederz'c C. [hi/e).

ATTNEY Jan. 5, 1954 B. A. WYMAN ET AL INCANDESCENT SPOTLIGHT LUMINAIRE 2Sheets-Sheet 2 Filed July 31, 1947 INVENTORS .Burfon /7. Wymazn FI der/cC. Win/ Zen WITNESSES:

-eral reasons. posed and the lamp faces have a high surface brightness.The assembly has an unfinished ap- Patented Jan. 5, 1954 INCANDESCENTSPOTLIGHT LUMINAIRE Burton A. Wyman and Cleveland, Ohio, ass ElectricCorporation, corporation of Pennsyl Frederic C. Winkler,

ignors to Westinghouse East Pittsburgh, Pa., a vania Application July31, 1947, Serial No. 765,096

Claims.

Our invention relates, generally, to luminaires and, more particularly,to an incandescent luminaire of the swivelling spotlight type which isparticularly adapted for the soptlighting of merchandise displays,either as a separate unit or in conjunction with other types ofluminaires procli-iciirlg general illumination.

The fluorescent lamp and luminaires utilizing such lamps have becomewidely used and accepted for the general lighting of stores and othercommercial establishments. While these luminaires are highlyadvantageous for this purpose from the standpoint of eiiiciency,brightness, coolness, etc., they do not provide for concentrated orspotlighting of merchandise displays. In almost every commercialestablishment there is a need for such concentrated lighting orhighlighting of featured merchandise, bill boards, animated displays,murals, demonstrations, etc.

While spotlights of the ordinary type are available for this purpose, itis highly desirable that the luminaire so used should be asinconspicuous as possible, mounted directly on the building walls,columns or ceilings and be an integral and streamlined part of thegeneral lighting system. These luminaires also should be readilyadjustable to allow the intense light beams produced thereby to bedirected or pointed in any desired direction. These luminaires should beso constituted as to produce an intense narrow light 'beam of lastingefliciency. Heretofore, attempts have been made to produce this kind ofspotlighting by using prefooused sealed beam lamps in a bare lampholder, swivelling or fixed, but such practice has not been foundsatisfactory for sev- The lamps when so used are expearance and does notharmonize with the other general lighting equipment. Accordingly, it isto the solution of this problem of providing eflicient, effective andpleasing spotligting of lamp displays and the like that our invention isdirected.

Therefore, the object of our invention, generally stated, is to providea luminaire of the swivelling spotlight type which will be of simple andefiicient design, of pleasing appearance and compact construction havingmaximum adjustability, and adapted to produce an intense narrow lightbeam. Amore specific object of our invention is to provide a luminaireof the character described which is adapted for use alone as a singlespotlight unit or in conjunction with other similar luminaires to form acombination spotlight unit, or in conjunction with other generallighting luminaires as combination units or assemblies.

A further object of our invention is to provide a luminaire of thischaracter wherein the lamp is supported or mounted on a readilyadjustable swivelling mechanism within the housing or body member ofsuch nature as to permit the lamp to be properly pointed in the desireddirection without making mechanical adjustments to release or retain thelamp in the desired position.

Another object of our invention is to provide a luminaire of thischaracter wherein the lamp and its socket are adjustably supported fromthe body member by means of a reflector housing pivotally secured at oneside only to a reflector ring which is rotatably mounted at the bottomof the body member, and adjustably secured to the reflector ring at itsother side by a friction device, thereby to permit both rotational andelevational adjustment of the lamp.

Another object of our invention is to provide in a luminaire of thecharacter described, for supporting the lamp from the body member bymeans of a lamp housing protruding through an opening in the body memberand adjustably secured thereto for elevational and rotational adjustmentin such manner that the bottom opening in the body member is alwaysclosed regardless of the position in which the reflector housing may beadjusted.

Another object of our invention is to provide a luminaire of thecharacter'described having a ring-shaped louver mounted at the openendof the reflector housing in front of the face of the lamp supported bythe housing, the louver being tapered longitudinally in accordance withthe angle of the light rays produced by the lamp.

These and other objects of our invention will become more apparent fromthe following detailed description when read in conjunction with thedrawingsin which:

Figure 1 is a general view of a lighting combination composed of aluminaire for producing general lighting and a pair of incandescentspotlight luminaires embodying the principal features of our invention;

Fig. 2 is a partial perspective view of the spotlight luminaire of ourinvention;

Fig. 3 is an exploded perspective view of the luminaire showing the lampassembly detached from the body member;

Fig. 4 is a perspective view of the complete luminaire;

Fig. 5 is an end elevational view, partly in crosssection of theluminaire;

Fig. 6 is a partial bottom view of the luminaire of Fig. 5;

Fig. 7 is a detail cross-sectional view taken along line VII-VII of Fig.6, and

Fig. 8 is a similar view taken along line VIII-VIII of Fig. 6.

Referring to Fig. 1, there is shown an arrangement comprised of aplurality of luminaires iii and H for producing general illumination.and a pair of spotlight luminaires l2 and Hi embodying our invention,mounted therewith in end-to-end relation.

The general lighting luminaires land I I may be, and preferably are, ofthe type disclosedin our copending application, Serial No. 764,936,filed July 31, 1947, and issued August 12, 1952 as Patent No. 2,606,998.These luminaires are adapted for use with tubular fluorescent lamps forproducing general illumination as distinguished from concentrated orspotlightillumination.

The luminaire of our present invention is so shaped and constructed thatit may be used with these other luminaires for producing generalillumination by simply mounting the various units in end-to-end relationin any desired combination. Fig. 1 illustrates only one possiblecombination.

In addition, the spotlight luminaire of our present invention may beused separately as a single spotlighting unit, or it may be combinedwith other similar luminaires to producea combination spotlighting unit.

Referring to Figs. 2, 3 and 4, it will be observed that our spotlightluminaire comprises, generally, a body member l5 and a lamp assembly 16.The complete unit also includes a pair of detachable end caps IT, asshown in Fig. 4, which are removed when it is desired to connect thespotlight luminaire in end-to-end relation with other luminaires.

Referring in addition to Fig. 5, the body member l5 may comprisea-trough-shaped canopy 18 to which are attached at its opposite ends, apair of end members l9 and'2l. The end members close the ends of thecanopy l8 and extend downwardly below the lower edges thereof. Thesedownwardly extending portions of the end members are fiat oval shaped,as clearly shown in all of these views, and are so formed as to provideinwardly facing channels 22, as shown in Fig. 5.

The body member [5 is provided with curved side walls 23 and 24, theends of which are dispo ed in channels 22. In this instance, the sidewalls are attached at their upper edges to the canopy by means of screws25 and are secured at their lower edges to mounting angles 26 by meansof screws 21.

The mounting angles 26 extend from one end of the body member to theother and are attached ,at their op osite ends to brackets 28 on the endmembers. These brackets may be separate-members or lanced out of the endmembers.

The cano y is relatively fi t on top. as shown in Fig. 5, to adapt itfor surface mounting on a ceiling or other supporting structure. A.wirin 4 channel or wireway 3i is provided inside the canopy by means ofthe channel member 32. The canopy is also provided with knock-outportions 33 at the ends thereof.

It will be apparent that the arrangement described provides a bodymember with a relatively large rectangular opening 34 at the bottom.This opening is provided with a detachable cover member 35 which is aportion of the lamp assembly 16. As shown best by Figs. 3 and 5, thecover member .35 is slightly curved to conformto the curvature of thelower edges of the end members l9 and 2 l. It is provided with a pair ofcircular openings 35 at its opposite ends and is detachably secured tothe body member at its four corners by means of screws 31 which extendinto suitable threaded openings at the ends of the mounting angles 26.

In this instance, the lamps 38 which are used aslighting sources for theluminaire are preferably of the prefocused sealed beam type, as shown.In order to provide for mounting these lamps so that they may be readilyadjustable in both a rotational as well as an elevational manner toproperly direct the light beams in the desired direction, they are eachsupported from the body member by means .of a swivelling mechanism ormounting indicated generally in Fig. 5 by the numeral 4|. Since thesemechanisms are identical, only one will be described in detail.

It will be observed that the swivelling mechanism 4| comprises .areflector housing 42 at the upper end of which is mounted a lamp socket43, a reflector ring 44 and as a part thereof, a friction support in theform of a U.-shaped spring member 45.

As shown best in Fig. 5, the reflector housing 42 is mounted with itslower or .open end extending out of the bodymember through the opening36 in the cover member 35. The reflector housing is supported directlyby the refiector ring 44, the outer rim portion 46 of which engages therim portion of the opening 36.

The ring member 44 is attached to the cover member 35 asshown in detailin Figs. 6, '7 and 8. The rim portion .46 of the ring member is held inengagement with the cover member by means of a plurality of spring clipmembers 48 which are attached to the ring member by means of suitablescrews 49. Two of the fastenings as indicated at A and B in Fig. .6 .areidentical and are shown in Fig. 8, .The other which is indicated at C inFig. 6, is shown in detail in Fig. 7. It is substantially the sameinsofar as the fastening arrangement is concerned, but in addition, includes a stop member 5|, the function of which will be describedhereinafter.

It will be apparent that by means of this arrangement, the ring member44 is rotatably mounted within the opening 36 in the cover mend-- 'ber.Referring to Fig. 5, it will be observed that a U-shaped stop bracket 52is mounted on the cover member between the reflector housings. This stopbracket has oppositely extending end portions 53 which are in the pathof movement of the stop member 5| carried by the ring member. By meansof this arrangement, the rotation of the ring member is limited tosomewhat less than 360.

The ring member 44 is provided with an upwardly extending flange portion54 defining a central opening which is of substantially the samediameter as the outside diameter of the reflector housing 42 at thispoint. In order to provide for so attaching the reflector housing to thering member that it may be moved in and out of the body member to effectelevational adjustment, it is loosely connected at one side only to theflange 54 of the ring member by means of a single clip member 55attached to the ring member 44 by the screw 49 with its end portion 55extending through an opening 51 in the side of the reflector housing asshown. This arrangement provides a pivotal or hinge connection betweenthe reflector housing and the ring member at this one side of thehousing. Any other suitable arrangement may be used.

The opposite side of the reflector housing is preferably supported andconnected to the ring member 44 by means of the U-shaped bail member 45which has its connecting portion 58 attached to the ring member, asshown clearly in Fig. 6 and its free ends 59 and Bi] extending upwardlyalong the opposite sides of the reflector housing, as shown clearly inFig. 5. In this instance, the bail member 45 is preferably composed ofspring wire and is attached to the ring member 44 by bending a portionof the flange 54 about the connecting portion 58, as shown.

In this embodiment of the invention, the free ends 59 and 50 of the bailmember engage the free ends of a clip member 5| which is attached to thehousing 42 adjacent its upper end. This arrangement is shown best inFig. 5 and is of such nature that the free ends of the bail memberengage the free ends of the clip member with sufficient frictional forceas to hold the reflector housing and its associated parts in any desiredposition of tilt from that shown in full lines to that shown in brokenlines.

It will be apparent that by means of this type of swivelling mechanismfor supporting the lamp, it may be readily adjusted in both elevationaland azimuth rotation without the use of tools of any kind. Both therotational and elevational adjustments are made by simply actuatingparts which are frictionally engaged and which remain in the position atwhich they are actuated.

An important feature of our invention resides in the fact that thereflector housing 42 always substantially fills the opening in the covermember 35, regardless of the position at which it is actuated. Theeffectiveness of the bail member in supporting the housing and holdingit in the desired position is also substantially uniform throughout therange of movement. These fea-- tures are produced by so shaping thecurvature of the walls of the reflector housing that the arc ofcurvature in the vertical plane has a radius point which substantiallycoincides with the pivotal attachment between the reflector housing andthe ring member. The same is true with respect to the curvature of thefree ends of the bail member 45. They also have a radius of curvatureabout this pivotal connection.

It is preferable to provide a light controlling louver for each of thelight sources. As shown in Fig. 5, each of the reflector housings isprovided with a ring-shaped louver 65 attached to a cover member 66 by aplurality of pins or bars 61. The cover member 56 is provided with acentral opening 68 having a diameter which is the same as or smallerthan the diameter of the face of the lamp. The ring-shaped louver 55 issupported within this opening 63 by the crossed pins 61 having theirends attached to the inner edge of the cover member 66 by crimped ears69, as shown.

It will be apparent that this arrangement causes most of the light fromthe lamp to be projected through a relatively small opening. The lightrays from lamps of this kind converge at a point about. 18 inches infront of the lamp face and then diverge. This creates a problem toprovide effective shielding by means of a louver, as the use of anylouver having side walls parallel to the lamp, will result in highreflected brightness. This results from the fact that the louver willintercept a large amount of converging light rays.

In order to avoid this and to provide for effective shielding, thelouver 65 is tapered, as shown, from the inside to the outside of thereflector housing to a degree or at an angle corresponding to the angleof convergence of the light rays. This arrangement is such as tointercept only a minimum of the light and also provides low brightnessof the louver.

As stated hereinbefore, ornamental end caps I! are provided anddetachably secured to the end members 19 and 2| of the body member toprovide a finished appearance to the luminaire. These end members may beattached to the end members in any suitable manner, such for example, asdescribed in the aforesaid copending application. As described therein,but not clearly shown in detail in the drawing of the presentapplication, these end members are provided with a plurality ofoutwardly extending lug portions (not shown) around the periphery whichengage spaced slots H in the end members, as shown in Fig. 2, forexample. The rigid portions of the end members snap in and out of theseslots in a well known manner.

If it is desired to use a single spotlight luminaire as a unit, both ofthe end members are attached. Where the spotlight luminaire is connectedin end-to-end relation with other luminaires and is the end unit, asshown in Fig. 1, only one of the end members is used. Accordingly, itwill be apparent that the use of ornamental, detachable end members makefor more flexible designs enabling the spotlight luminaire to be used orapplied in a variety of different ways.

In view of the foregoing detailed description of a preferred embodimentof our invention, it will be apparent that we have provided anincandescent spotlight luminaire of such shape and general appearancethat it may be readily combined with fluorescent lamp luminaires forgeneral lighting of the same shape and general appearance to achieve anintegration of the fluorescent and incandescent designs of fluorescentluminaires, not heretofore obtainable. This is an important aspect ofour invention in that it makes for a very flexible and pleasingarrangement to produce both general and spotlight illumination.

The luminaire of our invention is also of simple construction and is soconstructed that the light beam or beams produced thereby may be readilyadjusted, without the necessity of using tools, to any position withinthe range of the luminaire. Furthermore, it is so constructed that it iscomposed of only two main parts or assemblies, namely, the body memberand the lamp assembly.

While we have shown and described as a preferred embodiment a luminairehaving a pair of light producing elements or lamps, it is to beunderstood that our invention also contemplates a luminair with a singlelamp or a lu- 7 minaire with more than a pair of lamps as shown.

In addition, while we have shown and described, in detail, a preferredstructure, it is to be understood that the principles of our inventionmay be embodied in other forms without departing from the spirit of theinvention.

We claim as our invention:

1. A spotlight luminaire comprising, a body member having a bottomportion with a circular opening therein, a sealed beam lamp, an invertedcup-shaped reflector housing including a lamp socket for supporting thelamp within the body member, a ring member rotatably mounted on thebottom portion of the body member around the edge of the bottom opening,means pivotally securing the reflector housing at one side to the ringmember, the open end of the reflector housing extending through the ringmember and bottom opening and being of a size to substantially fill theopening in said ring, and additional means adjustably securing the otherside of the reflector housing to the other side of the ring member,whereby the ring member may be rotated to effect rotational adjustmentof the reflector housing and the reflector housing itself rotated aboutits pivotal support in a plane at right angles to the plane of rotationof the ring member, the curvature of the walls of said cup-shapedreflector housing having a radius point in the plane of its pivotalrotation which substantially coincides with the pivot of said housing,whereby said housing and ring substantially fill said circular openingin the bottom portion of said body member for all operative positions ofsaid housing.

2. A spotlight luminaire comprising, a body member having a bottom plateportion with an opening therein, an inverted cup-shaped reflectorhousing mounted in the body member with its open end extending outwardlythrough the bottom opening, said bottom opening being larger than thereflector housing, a reflector ring member encircling the reflectorhousing and having a flat rim portion slidably secured to and inengagement with the rim of the bottom opening, said ring member beingpivotally attached at one point only to the side wall of the reflectorhousing, and means including a U- shaped bail member attached to theopposite side of the ring member from the pivotal attachment and havinga slidable frictional connection to the reflector housing for adjustablysupporting the reflector housing at its other side, thereby to provide aswiveling attachment of the reflector housing to the bottom portion ofthe body member.

3. A spotlight luminaire comprising, a body member having a bottomportion with an opening therein, an inverted cup-shaped reflectorhousing mounted in the body member with its open end extending outthrough the bottom opening, a reflector ring member encircling thereflector housing and having a flat rim portion slidably mounted on thebottom portion of the body member and also having an upstanding flangeportion, a connecting member between the rim portion and the reflectorhousing forming a pivotal connection therebetween at one side of thereflector housings; clipmember attached to the opposite side of thereflector housing, and a U-shaped wire bail attached to the oppositeside of'the'ringm'e'mb'er having the free ends of the U extendingupwardly along the sides of the reflector housing into frictionalengagement with the clip member for adjustably supporting the saidopposite side of the reflector housing, whereby the reflector housingmay be rotated in one plane by rotating the reflector ring and inanother plane by rotating it about the pivotal connection on thereflector ring, to thus provide a swiveling mounting for a lamp carriedby the reflector housing.

4.. A spotlight luminaire comprising, a body member having a bottomportion with an opening therein, an inverted cup-shaped reflectorhousing mounted in the body member with its open end extending outthrough the bottom opening, a lamp socket mounted on the reflectorhousing for supporting a lamp therein, a reflector ring memberencircling the reflector housing and having a flat rim portion engagingand overlapping the rim portion of the bottom opening, a plurality ofclip members retaining said rim portions together in frictional slidingrelation, a stop member mounted on the bottom portion of the body memberfor limiting th rotational movement of the ring member, said ring memberhaving an upstanding circumferential flange portion around its insideedge forming an opening to receive the reflector housing in slidingrelation, a pivotal connection between the ring member and the adjacentside wall of the reflector housing at one side only, a clip member inthe form of a cross bar attached to the opposite side of the reflectorhousing adjacent its upper end, and a U-shaped bail member attached tothe opposite side of the reflector ring with the free ends thereofextending upwardly along the sides of the housing in engagement with thefree ends of the clip member to slidably support the said opposite sideof the reflector housing, said opposite side of the reflector housinghaving a curvature determined by an arc the radius point of which is onthe pivotal connection between the reflector housing and flange of thereflector rim, whereby the reflector housing substantially fllls thopening in the reflecting ring as it is swung in and out of the bodymember.

5. A spotlight luminaire comprising, a housing having a bottom opening,a circular plate supported at its peripher by said housing in saidbottom opening for rotation about a substantially vertical axis, saidplate having an opening therethrough in which a lampholder is mounted bya pivotal connection located at one side thereof on a substantiallyhorizontal axis to said plate so as to be movable between upper andlower extrem positions about said horizontal axis, said lampholderhaving means above said openings .for supporting a lamp so that at theupper extreme position the lamp depends substantially vertically fromits supporting means and its lower end is adjacent said openings andlight will be directed downwardly through said plate opening, and at thelower extreme position said lamp extends through said openings at anangl to the vertical with its lower end spaced substantially below saidopenings, said lampholder having shielding means positioned about atleast the side portions of the lamp which project below said openings atthe aforesaid lower extreme positions, and separate means located at theopposite side of said lampholder frictionally connecting th lampholderand supporting means for maintaining said lampholder at any angularposition to which it may be manually adjusted about said horizontalaxis.

BURTON A. VIYMAN. FREDERIC C. WINKLER.

References Cited in the file of this patent UNITED STATES PATENTS NumberGaletzky Oct. 20, 1931 10 Number Name Date 2,063,744 Kramer Dec. 8, 19362,134,491 Sibbert Oct. 25, 1938 2,152, 97 Levy Mar, 28, 1939 2,179,161Rambusch Nov. 7, 1939 2,189,008 Kurth Feb. 6, 1940 2,232,543 Logan Feb.18, 1941 2,390,634 Aufiero Dec, 11, 1945 2,434,108 Handler Jan. 6, 1948OTHER REFERENCES General Lighting 00., Rotobeam, Lighting and Lamps,March 1946, page 122.

